Can you help me identify this gun?

Someone on a 1911 forum posted these pics, wanting to know what it is. The trigger guard tells me it's a Beretta. However, I'm pretty new to guns and just recently acquired my first Beretta. I figured this would be the place to ask. Any help would be appreciated. BTW, I'm Skot, a new member from Wichita, KS. Good to be here.

Before you kick in my door, you should know, it's not there for MYprotection...

It's not a Beretta of the 92 ilk(no locking block, fixed barrel), or any other Beretta 80's series for that matter of the blowback design w/ a fixed barrel of that type. The 92 series was derived from the M1922(open slide design) and the Walther P-38(locking block/open slide design) in 1951 and evolved to what we have today, never had a fixed barrel. The trigger guard looks like a later model 92FS design, but whatever that is above was never in the Beretta chain. Looks like a sad attempt at a copy; as many country's did produce offtakes of the Beretta 1951/92 design. I can't identify it, but I'm cetain at least it's not a Beretta, mama mia.

Thoughts:
1. It's a casting, not a forging. Maybe a "non-gun"?
2. Integral barrel, neither pressed nor pinned in place. Still maybe a "non-gun." But maybe there's a steel liner? So maybe a .22 rimfire?
3. Barrel sits way up high, so recoil spring rode underneath the barrel. Thus not a Walther-PPK-style pistol. However, most probably DA/SA ("Traditional DA").
4. The missing rear half of the frame and grip would've contained the firing mechanism. Thus frame too weak to be for any reasonably potent caliber. Maybe a .22 rimfire.
5. Well, it does seem to have a serial number (top photo, on frame, just under middle of barrel). So maybe it's really a gun after all. Still maybe a .22 rimfire.
6. Maybe something Spanish? Or South American?